Pressure gauge assembly for bicycle tire

ABSTRACT

A pressure gauge assembly for a bicycle tire includes a gauge portion having an indicator, a shaft, and a lower portion. The shaft includes a recess and a channel portion which is in communication with the recess and the gauge portion. A button is mounted in the recess. The lower portion defines a compartment in communication with the channel portion. Two bushings, respectively engage two ends of the compartment, and a drive member mounted with an O-ring is included in the compartment. Two holes, respectively, defined on two ends of the drive member are not in communication with each other. A protruding end is defined on an end and a insert end included in another end of the drive member The drive member is moveable in the compartment.

FIELD OF THE INVENTION

The present invention relates to a pressure gauge assembly for bicycle tire. In particular, the present invention relates to a pressure gauge assembly for bicycle tire that can be used with valves of American and French types.

DESCRIPTION OF THE RELATED ART

Referring to FIG. 7, it's a perspective view of a conventional pressure gauge assembly for bicycle tire. The conventional pressure gauge assembly comprises a head portion 1 having an indicator, an upper portion 2 including a lower portion 3 which can be coupled an American type valve 4. The conventional pressure gauge assembly only comprises one lower portion so that only can used with on kind type of valve.

SUMMARY OF THE INVENTION

It is therefore the purpose of this invention to provide a pressure gauge assembly for bicycle tire, which comprises a gauge portion having an indicator, a shaft including a recess and a channel portion which is in communication with the recess and the gauge portion, and a button mounted in the recess; a lower portion defining a compartment in communication with the channel portion, a first bushing and a second bushing respectively engaging to two ends of the compartment and a drive member mounted a O-ring engaging in thereof, a first and a second hole respectively defined on two ends of the drive member and the two holes are not in communication with each other, a protruding end defined on an end thereof and a insert end included in another end, and the drive member is moveable in the compartment.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a pressure gauge assembly for bicycle tire in accordance with the present invention.

FIG. 2 is an exploded view of a pressure gauge assembly for bicycle tire in accordance with the present invention.

FIG. 3 is a sectional view taken along plane 3-3 in FIG. 1, a sectional view of the shaft and the lower portion in accordance with the present invention.

FIG. 4 is a sectional view illustrating use of the pressure gauge assembly for bicycle tire with an American type valve.

FIG. 5 is a sectional view illustrating use of the pressure gauge assembly for bicycle tire with a French type valve.

FIG. 6 is a sectional view of the button in accordance with the present invention.

FIG. 7 is a perspective view of a conventional pressure gauge assembly for bicycle tire.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring to FIGS. 1, 2 and 3, the pressure gauge assembly in accordance with the present invention comprises a gauge portion 10, a shaft 20 and a lower portion 30. And the shaft 20 connects with the gauge portion 10 and the lower portion 30.

The gauge portion 10 is discoidal, and has an indicator. A user can get the data of tire pressure via the gauge portion 10.

The shaft 20 includes a recess 21 mounting a button 22 and a channel portion 23 which defined in the interior of the shaft 20 communicating with the recess 21. An end of the channel portion 23 communicates to a compartment 31 of the lower portion 30 and another end communicates to the gauge portion 10. The gauge portion 10 measures the pressure and shows via the indicator. And two sides of the outer surface of the shaft 20 respectively forms a non-slip portion, so when a user holds the pressure gauge assembly, it's not easy to slide.

Two ends of the compartment 31 defined in the lower portion 30 are open and the internal diameter of the compartment 31 decreasing from two ends to the center, and the drive member 32 engaging in the place having smaller internal diameter. A first bushing 33 and a second bushing 34 respectively engage in the place having major internal diameter. And the portion between the major and smaller diameters defines an inclined plate 311. The interior of the compartment 31 includes a drive member 32, an O-ring 321 mounting on the middle thereof. A first end 322 of the drive member 32 defines a first aperture 323 and a protruding end 324; a second end 325 of the drive member 32 defines a second aperture 326 and a insert end 327, and two apertures 323,326 are not in communication with each other.

A first bushing 33 is engaged in the interior having major diameter of the compartment 31 near the protruding end 324 and a second bushing 34 is engaged near the insert end 327. The first bushing 33 defines a through hole 331, and the second bushing 34 defines a first hole 341 and a second hole 342. A first cap 35 defining a first transverse hole 351 and a second cap 36 defining a second transverse hole 361 respectively engages with two ends of the compartment 31.

Referring to FIGS. 4 and 5, when measuring the tire pressure with an American type valve 40, the first transverse hole 351 of the first cap 35 couples on the American type valve 40 here a first nozzle 41 of the American type valve 40 attaches to a side of the first bushing 33 and a first needle 42 attaches to the protruding end 324 so the first bushing 33 is tightly pressing to the inclined plate 311. The through hole 331 of the first bushing 33 engages to the protruding end 324, and another side of the first bushing 33 pushing the drive member 32 related to the second bushing 34 attached to the second cap 36. The O-ring 321 of the drive member 32 moves from the place blocking the recess 21 to the place near the second cap 36. The inter part of the compartment 31 moves to the second bushing 34, and the O-ring 321 closes the compartment 31 so that the air enters the gauge portion 10 only via the channel portion 23 and shows the data of pressure on the indicator.

When measuring the tire pressure with a French type valve 50, the second transverse hole 361 of the second cap 36 couples on the French type valve 50 here a second nozzle 51 is mounted in the first hole 341 and the second hole 342, and a second needle 52 is mounted in the insert end 327 that the air enters the channel portion 23 via the first aperture 323. The second bushing 34 is tightly pressing to the inclined plate 311. A side of the second bushing 34 pushing the drive member 32 related to the first bushing 33 attached to the first cap 35. The O-ring 321 of the drive member 32 moves to the place near the first cap 35. The inter part of the compartment 31 moves to the first bushing 33, and the O-ring 321 closes the compartment 31 so that the air enters the gauge portion 10 only via the channel portion 23 and shows the data of pressure on the indicator.

Referring to FIG. 6, the shaft 20 includes a recess 21 in communication with the channel portion 23. A button 22 includes a pin 221 which mounted in an elastic element 222 and mounts in the recess 21 via a fixed element 213. When the measuring tire pressure is higher than ideal pressure, the air could slowly leak to the recess 21 via the channel portion by pressing the button 22. Therefore a user could observe the leak data via the gauge portion 10 and get the ideal tire pressure easily.

Summarizing the above-mentioned, the advantages of the present invention are:

1. The pressure gauge assembly for bicycle tire can be used with valves of American and French types, and it could save the cost and decrease the occupation.

2. The pressure gauge assembly for bicycle tire comprises a button and it is easy get the ideal tire pressure via thereof.

3. The pressure gauge assembly for bicycle tire comprises a compartment having two ends thereof defining an inclined plate, and the bushings attaching to the inclined plate could close the compartment not leaking.

Although a specific embodiment has been illustrated and described, numerous modifications and variations are still possible. The scope of the invention is limited by the accompanying claims. 

1. The pressure gauge assembly for a bicycle tire comprising: a gauge portion including an indicator; a shaft including the gauge portion formed on an end thereof, a channel portion defined in the shaft communicating with the indicator; a lower portion formed on another end of the shaft including a compartment in communication with the channel portion; a first bushing and a second bushing respectively received in two ends of the compartment; a drive member with an 0-ring mounted thereon and located in the compartment; a first aperture and a second aperture respectively defined on two ends of the drive member, with the first and second apertures not in communication with each other; and a protruding end defined one of the two ends of the drive member and a insert end included in the other of the two ends of the drive member, with the drive member moveable in the compartment.
 2. The pressure gauge assembly for a bicycle tire as claimed in claim 1, with an internal diameter of the compartment decreasing from the two ends to a center, and with the drive member engaging in a place of the compartment having a smaller internal diameter and the first and second bushings respectively engaging in the compartment having major internal diameters.
 3. The pressure gauge assembly for a bicycle tire as claimed in claim 2, wherein the compartment between the major and smaller diameters defines an inclined surface.
 4. The pressure gauge assembly for a bicycle tire as claimed in claim 1, wherein the first bushing defines a through hole for coupling with an American type valve.
 5. The pressure gauge assembly for a bicycle tire as claimed in claim 1, wherein the second bushing defines two holes for coupling with a French type valve.
 6. The pressure gauge assembly for a bicycle tire as claimed in claim 1, further comprising a first cap and a second cap respectively engaging the two ends of the compartment.
 7. The pressure gauge assembly for a bicycle tire as claimed in claim 1, wherein recess is defined on the shaft in communication with the gauge portion via the channel portion, and a button is mounted in the recess.
 8. The pressure gauge assembly for a bicycle tire as claimed in claim 7, with the button including a pin mounted in an elastic element and mounted in the recess via a fixed portion.
 9. The pressure gauge assembly for a bicycle tire as claimed in claim 1, wherein each of two sides of an outer surface of the shaft has a non-slip portion. 